Congress MP Shashi Tharoor said Tuesday he was 'stunned' over Delhi Police registering a murder case in connection with the death of his wife Sunanda a year ago and sought 'full information' from investigators.

Congress MP Shashi Tharoor said Tuesday he was "stunned" over Delhi Police registering a murder case in connection with the death of his wife Sunanda a year ago and sought "full information" from the investigators on the basis of which the conclusion was arrived at.

Calling for a "comprehensive investigation" into the case so that "unvarnished truth" comes out, he said he will continue to extend full cooperation to the police.

"I am stunned to hear that the Delhi Police have filed a case of murder against unknown persons in the demise of my late wife Sunanda. Needless to say I am anxious to see this case is investigated thoroughly and continue to assure the police of my full co-operation," Tharoor said in a statement.

The former Union minister also requested the police for copies of the post-mortem and CFSL reports, saying that he had not been given these till date.

"We have not been provided with copies of the post-mortem report and other reports of the inquiry like the CFSL report till date. We repeat our request for a copy of these reports to be provided to us immediately," he said.

Delhi Police registered a case of murder after a medical report said that Sunanda Pushkar's death was unnatural and was caused due to poisoning but nobody has been named as a suspect as yet.

It was not clear whether Sunanda had consumed poison on her own or it was administered forcefully or by injection, police said.

Tharoor asked the police for "full information" on the basis of which the case was filed.

"Although we never thought of any foul play in the death of my wife, we all want that a comprehensive investigation be conducted and that the unvarnished truth should come out.

"In the meantime I join all members of Sunanda's family in asking for full information about the basis on which the police have come to this conclusion," the Congress leader said.

Sunanda, 51, was found dead in a luxury hotel in Delhi on January 17, last year.

Congress spokesperson Abhishek Singhvi said registration of a case one year after the death raises question marks and suspicions. "It is a legal process. Every case need not be sensationalised," he said.

BJP spokesperson GVL Narasimha Rao said the registration of a murder case had ended the confusion, and hoped that the investigation will be concluded soon and the guilty prosecuted.